diff --git a/npc/CMakeLists.txt b/npc/CMakeLists.txt
index cbe4ac3..ea71a1f 100644
--- a/npc/CMakeLists.txt
+++ b/npc/CMakeLists.txt
@@ -19,7 +19,7 @@ find_path(NVBOARD_INCLUDE_DIR NAMES nvboard.h)
 
 set(TOPMODULES "Keyboard")
 
-foreach(TOPMODULE in LISTS TOPMODULES)
+foreach(TOPMODULE IN LISTS TOPMODULES)
 
   set(SCALA_CORE "${CMAKE_CURRENT_SOURCE_DIR}/core")
   set(CHISEL_MODULE_CLASS "${CMAKE_PROJECT_NAME}.${TOPMODULE}")